What could be better than a fully digitized, completely free, web-based Audubon Field Guide? The resources available on this site are as useful as they are beautiful. In addition to the Song and Calls section and the individual profiles of hundreds of birds (both listed below), environmentally conscious readers will likely find the coverage of the Gulf of Mexico oil spill extremely informative. The navigation of the site is both functional and fun, and components such as the 2015 Photography Awards, with its heart-stopping images of birds from around the world, will delight and amaze. The Audubon field guides have sold over 18 million copies since Alfred A. Knopf published the first illustrated and descriptive books in 1934. This informative website, which features beautiful drawings and photographs as well as extensive descriptions of birds from around North America, is intuitive and pleasing to the eye. Readers can start by selecting the Featured Bird, by typing the name of a specific species into the search function, or by sorting the guide into taxonomic family or region. Each record then opens to provide detailed information, including facts about Habitat, Migration, and Feeding Behavior. Perhaps best of all, the Songs and Calls section (stocked from over 2,500 sound files created by Lang Elliott) lets readers experience the song of the Acadian Flycatcher or the rhythms of the Acorn Woodpecker among others.